On our Road Warrior there are 2 disconnects factory installed, one for batteries and the other for inside. Our backup camera is also wired to the batteries instead of lights so it can be used without lights. So leaving a disconnect on supplies power to the camera 24/7 along with other items such as the radio, CO2 detector and a few other items, big one is the residential fridge.
2018 Road Warrior 427/2016 golf cart (gas)
2017 Ram 3500 w/Aisin w/4:10
2 Dachshunds DJ (RIP 9-12-19) & Joey (RIP 5-14-21)